Check damper



Sept. 2, 1930.

H. J. BROWN CHECK DAMPER Filed July l2, 1929 2 Sheets-Sheet l ZeBron/W .NVENTOR ATTORNEY y Sept. 2, 1930. H, BROWN 1,775,065

CHECK DAHPER 2 .belraw ATTORNEY Patented sept. 2, 1930 UNETED STA The HERBERT J. BROWN, OF GEOBGETOWN, NEW YORK CHECK DAMPER y Application filed July 12,

This invention relates to a check damper for furnaces and the like, the general object of the invention being to so form the damper that it will admit air into the smoke pipe without danger of gas or smoke escaping through the opening controlled by the damper so that fresh air can enter the smoke pipe, while gas and smoke are prevented from escaping from the pipe.

This invention also consists in certain other features of construction and in the com bination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure l is an elevation with parts in section.

Figure 2 is an end view looking toward the damper.

Figure 3 is a section on line 3 3 of Figure l.

Figure 4 is a perspective view of the damper.

Figure 5 is a view showing the damper arranged in the upwardly extending portion of the smoke pipe.

Figure 6 is a section on line 6 6 of Fig-- ure 5.

Figure 7 is a section on line 7L-7 of Figure 6.

Referring to Figures 1 to 4, both inclusive, an opening l is formed in the free end of the horizontal part 2 of the smoke pipe of the furnace A and this opening is controlled by the damper B which is composed of a plate 3 hingedly connected with the end of the portion 2, as shown at 4, so that the plate cau be moved inwardly to permit air to enter the pipe to check the draft in the usual manner and a pair of substantially triangular shaped wings 5 is formed with the outer face of the plate, each wing being spaced slightly from the side edge of the plate. These wings contact the side walls of the opening 1929. Serial No. 377,767.

l and when the damper is in open position, said wings will bridge the space between the sides of the plate 3 and the side walls of the opening l and thus prevent the escape of gas and smoke through the opening, while permitting air to enter the pipe through the top part of the opening and pass over the top edges of the plate and wings. The flanges 6, formed by spacing the wings from the side edges ofthe plate, will contact the side walls of the opening l when the damper is closed, and thus prevent leakage between the damper and the end of the section 2. An arm 7 is connected with the outerr face of the plate 3 and extends outwardly beyond the section 2 and a weight 8 is connected with said arm and acts to normally hold the damper in closed position. A chain or cable 9 is also connected with the arm and passes to the living room or other room of a building, so that the damper can be moved to open p0sition from said room. i

A bafiie plate l0 is removably arranged in the section 2 under the section 2 of the smoke pipe which extends upwardly from the section 2, and this baffle plate acts to prevent the gases and smoke from entering the outer portion of the section 2 and to cause the gas and smoke to pass up the section 2.

In the modification shown in Figures 5, 6 and 7, the check damper B is placed in a casing 10 which covers an opening formed in the section 2 of the smoke pipe, instead of being placed in the end of the section 2, as in the first form of the invention. In other respects, the parts are similar to those shown in Figures l to 4.

From the foregoing it will be seen that I have provided a simple form of check damper which will readily admit fresh air into the smoke pipe, while permitting the escape of smoke and gases from the smoke pipe when the damper is in open position.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of thc several parts,

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provided that such changes fall within the scope of the appended claims.

What I claim is 1. A check damperY of the class described having,l outwardly extending Wings thereon for preventing` the escape of gas and smoke when the damper is in open position.

2. ln Icombination with a sinokepipe having` an opening therein, an inwardly moving check damper pivotally Connected with a part et the pipe and closing the opening when in closing position and a pair of wings connect d with the outer face of the damper and spaced from the sides thereof for bridging the space between the damper and the side walls ofL the opening when the damper is in open position.

3. in combination with a smoke pipe havan opening therein, an inwardly moving' cheek damper pivotally connected with a part of thepipe and closing the opening when in closing position and a pairoi' wings connectved with the outer faceof the damper and spaced from the sides thereof for bridging the space between the damper and the side walls ofthe opening when the damper is in open position, an arni `connected with the outer face of the damper, a weight connected` with the arm and operating means for the damper connected with said erm.

4... iny combination with a smoke pipe havingv an opening therein, an inwardly moving 'damper pivotally connected with a part of Vthe pipe and closing the opening when in closed position and a pair of wingsfor bridging the space between the damperl and the sidewalls of theopening when the damper is in open position.

in testimony whereof I aiiX my signature.

HERBERT J. BROWN. 

